EP 0133994 A3 19860423 - OPTICAL PICKUP HAVING A DRIVING UNIT
Title (en)
OPTICAL PICKUP HAVING A DRIVING UNIT
Publication
Application
Priority
- JP 729384 U 19840123
- JP 12105283 U 19830803
- JP 14225483 A 19830803
Abstract (en)
[origin: EP0133994A2] An optical pickup has a driving unit for driving a driven member which has an objective lense (26). The driving unit has an open loop arrangement of a pair of magnets (20A, 20B; 20A min , 20B min ), the same poles of which oppose each other.
IPC 1-7
IPC 8 full level
G11B 7/09 (2006.01)
CPC (source: EP US)
G11B 7/093 (2013.01 - EP US)
Citation (search report)
- [X] EP 0077581 A1 19830427 - PHILIPS NV [NL]
- [A] EP 0070070 A1 19830119 - PHILIPS NV [NL]
- [A] FR 2493017 A1 19820430 - SONY CORP [JP]
- [A] EP 0068757 A1 19830105 - SONY CORP [JP]
- [A] EP 0021501 A1 19810107 - PHILIPS NV [NL]
- PATENT ABSTRACTS OF JAPAN, vol. 7, no. 48 (P-178) [1193], 24th February 1983; & JP-A-57 195 339 (PIONEER K.K.) 01-12-1982
- PATENT ABSTRACTS OF JAPAN, vol. 8, no. 38 (P-255) [1475], 18th February 1984; & JP-A-58 189 846 (SHIN NIPPON DENKI K.K.) 05-11-1983
- PATENT ABSTRACTS OF JAPAN, vol. 8, no. 86 (P-269) [1523], 19th April 1984; & JP-A-59 002 238 (FUJITSU K.K.) 07-01-1984
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0133994 A2 19850313; EP 0133994 A3 19860423; EP 0133994 B1 19900808; CA 1249744 A 19890207; DE 3482921 D1 19900913; US 4643522 A 19870217
DOCDB simple family (application)
EP 84109181 A 19840802; CA 459979 A 19840730; DE 3482921 T 19840802; US 63560784 A 19840730